gentbi.c

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    1 /*      $NetBSD: gentbi.c,v 1.10 2003/04/29 01:49:33 thorpej Exp $      */
    2 
    3 /*-
    4  * Copyright (c) 1998, 1999, 2000, 2001 The NetBSD Foundation, Inc.
    5  * All rights reserved.
    6  *
    7  * This code is derived from software contributed to The NetBSD Foundation
    8  * by Jason R. Thorpe of the Numerical Aerospace Simulation Facility,
    9  * NASA Ames Research Center.
   10  *
   11  * Redistribution and use in source and binary forms, with or without
   12  * modification, are permitted provided that the following conditions
   13  * are met:
   14  * 1. Redistributions of source code must retain the above copyright
   15  *    notice, this list of conditions and the following disclaimer.
   16  * 2. Redistributions in binary form must reproduce the above copyright
   17  *    notice, this list of conditions and the following disclaimer in the
   18  *    documentation and/or other materials provided with the distribution.
   19  * 3. All advertising materials mentioning features or use of this software
   20  *    must display the following acknowledgement:
   21  *      This product includes software developed by the NetBSD
   22  *      Foundation, Inc. and its contributors.
   23  * 4. Neither the name of The NetBSD Foundation nor the names of its
   24  *    contributors may be used to endorse or promote products derived
   25  *    from this software without specific prior written permission.
   26  *
   27  * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
   28  * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
   29  * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
   30  * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
   31  * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
   32  * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
   33  * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
   34  * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
   35  * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
   36  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
   37  * POSSIBILITY OF SUCH DAMAGE.
   38  */
   39 
   40 /*
   41  * Copyright (c) 1997 Manuel Bouyer.  All rights reserved.
   42  *
   43  * Redistribution and use in source and binary forms, with or without
   44  * modification, are permitted provided that the following conditions
   45  * are met:
   46  * 1. Redistributions of source code must retain the above copyright
   47  *    notice, this list of conditions and the following disclaimer.
   48  * 2. Redistributions in binary form must reproduce the above copyright
   49  *    notice, this list of conditions and the following disclaimer in the
   50  *    documentation and/or other materials provided with the distribution.
   51  * 3. All advertising materials mentioning features or use of this software
   52  *    must display the following acknowledgement:
   53  *      This product includes software developed by Manuel Bouyer.
   54  * 4. The name of the author may not be used to endorse or promote products
   55  *    derived from this software without specific prior written permission.
   56  *
   57  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
   58  * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
   59  * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
   60  * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
   61  * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
   62  * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
   63  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
   64  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
   65  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
   66  * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
   67  */
   68 
   69 /*
   70  * Driver for generic ten-bit (1000BASE-SX) interfaces, built in to
   71  * many Gigabit Ethernet chips.
   72  *
   73  * All we have to do here is correctly report speed and duplex.
   74  */
   75 
   76 #include <sys/cdefs.h>
   77 __KERNEL_RCSID(0, "$NetBSD: gentbi.c,v 1.10 2003/04/29 01:49:33 thorpej Exp $");
   78 
   79 #include <sys/param.h>
   80 #include <sys/systm.h>
   81 #include <sys/kernel.h>
   82 #include <sys/device.h>
   83 #include <sys/socket.h>
   84 #include <sys/errno.h>
   85 
   86 #include <net/if.h>
   87 #include <net/if_media.h>
   88 
   89 #include <dev/mii/mii.h>
   90 #include <dev/mii/miivar.h>
   91 #include <dev/mii/miidevs.h>
   92 
   93 int     gentbimatch(struct device *, struct cfdata *, void *);
   94 void    gentbiattach(struct device *, struct device *, void *);
   95 
   96 CFATTACH_DECL(gentbi, sizeof(struct mii_softc),
   97     gentbimatch, gentbiattach, mii_phy_detach, mii_phy_activate);
   98 
   99 int     gentbi_service(struct mii_softc *, struct mii_data *, int);
  100 void    gentbi_status(struct mii_softc *);
  101 
  102 const struct mii_phy_funcs gentbi_funcs = {
  103         gentbi_service, gentbi_status, mii_phy_reset,
  104 };
  105 
  106 int
  107 gentbimatch(struct device *parent, struct cfdata *match, void *aux)
  108 {
  109         struct mii_attach_args *ma = aux;
  110         struct mii_data *mii = ma->mii_data;
  111         int bmsr, extsr;
  112 
  113         /*
  114          * We match as a generic TBI if:
  115          *
  116          *      - There is no media in the BMSR.
  117          *      - EXTSR has only 1000X.
  118          */
  119         bmsr = (*mii->mii_readreg)(parent, ma->mii_phyno, MII_BMSR);
  120         if ((bmsr & BMSR_EXTSTAT) == 0 || (bmsr & BMSR_MEDIAMASK) != 0)
  121                 return (0);
  122 
  123         extsr = (*mii->mii_readreg)(parent, ma->mii_phyno, MII_EXTSR);
  124         if (extsr & (EXTSR_1000TFDX|EXTSR_1000THDX))
  125                 return (0);
  126 
  127         if (extsr & (EXTSR_1000XFDX|EXTSR_1000XHDX)) {
  128                 /*
  129                  * We think this is a generic TBI.  Return a match
  130                  * priority higher than ukphy, but lower than what
  131                  * specific drivers will return.
  132                  */
  133                 return (2);
  134         }
  135 
  136         return (0);
  137 }
  138 
  139 void
  140 gentbiattach(struct device *parent, struct device *self, void *aux)
  141 {
  142         struct mii_softc *sc = (struct mii_softc *)self;
  143         struct mii_attach_args *ma = aux;
  144         struct mii_data *mii = ma->mii_data;
  145 
  146         aprint_naive(": Media interface\n");
  147         aprint_normal(": Generic ten-bit interface, rev. %d\n",
  148             MII_REV(ma->mii_id2));
  149 
  150         sc->mii_inst = mii->mii_instance;
  151         sc->mii_phy = ma->mii_phyno;
  152         sc->mii_funcs = &gentbi_funcs;
  153         sc->mii_pdata = mii;
  154         sc->mii_flags = ma->mii_flags;
  155         sc->mii_anegticks = 5;
  156 
  157         PHY_RESET(sc);
  158 
  159         /*
  160          * Mask out all media in the BMSR.  We only are really interested
  161          * in "auto".
  162          */
  163         sc->mii_capabilities =
  164             PHY_READ(sc, MII_BMSR) & ma->mii_capmask & ~BMSR_MEDIAMASK;
  165         if (sc->mii_capabilities & BMSR_EXTSTAT)
  166                 sc->mii_extcapabilities = PHY_READ(sc, MII_EXTSR);
  167 
  168         aprint_normal("%s: ", sc->mii_dev.dv_xname);
  169         if ((sc->mii_capabilities & BMSR_MEDIAMASK) == 0 &&
  170             (sc->mii_extcapabilities & EXTSR_MEDIAMASK) == 0)
  171                 aprint_error("no media present");
  172         else
  173                 mii_phy_add_media(sc);
  174         aprint_normal("\n");
  175 }
  176 
  177 int
  178 gentbi_service(struct mii_softc *sc, struct mii_data *mii, int cmd)
  179 {
  180         struct ifmedia_entry *ife = mii->mii_media.ifm_cur;
  181         int reg;
  182 
  183         switch (cmd) {
  184         case MII_POLLSTAT:
  185                 /*
  186                  * If we're not polling our PHY instance, just return.
  187                  */
  188                 if (IFM_INST(ife->ifm_media) != sc->mii_inst)
  189                         return (0);
  190                 break;
  191 
  192         case MII_MEDIACHG:
  193                 /*
  194                  * If the media indicates a different PHY instance,
  195                  * isolate ourselves.
  196                  */
  197                 if (IFM_INST(ife->ifm_media) != sc->mii_inst) {
  198                         reg = PHY_READ(sc, MII_BMCR);
  199                         PHY_WRITE(sc, MII_BMCR, reg | BMCR_ISO);
  200                         return (0);
  201                 }
  202 
  203                 /*
  204                  * If the interface is not up, don't do anything.
  205                  */
  206                 if ((mii->mii_ifp->if_flags & IFF_UP) == 0)
  207                         break;
  208 
  209                 mii_phy_setmedia(sc);
  210                 break;
  211 
  212         case MII_TICK:
  213                 /*
  214                  * If we're not currently selected, just return.
  215                  */
  216                 if (IFM_INST(ife->ifm_media) != sc->mii_inst)
  217                         return (0);
  218 
  219                 if (mii_phy_tick(sc) == EJUSTRETURN)
  220                         return (0);
  221                 break;
  222 
  223         case MII_DOWN:
  224                 mii_phy_down(sc);
  225                 return (0);
  226         }
  227 
  228         /* Update the media status. */
  229         mii_phy_status(sc);
  230 
  231         /* Callback if something changed. */
  232         mii_phy_update(sc, cmd);
  233         return (0);
  234 }
  235 
  236 void
  237 gentbi_status(struct mii_softc *sc)
  238 {
  239         struct mii_data *mii = sc->mii_pdata;
  240         struct ifmedia_entry *ife = mii->mii_media.ifm_cur;
  241         int bmsr, bmcr, anlpar;
  242 
  243         mii->mii_media_status = IFM_AVALID;
  244         mii->mii_media_active = IFM_ETHER;
  245 
  246         bmsr = PHY_READ(sc, MII_BMSR) | PHY_READ(sc, MII_BMSR);
  247 
  248         if (bmsr & BMSR_LINK)
  249                 mii->mii_media_status |= IFM_ACTIVE;
  250 
  251         bmcr = PHY_READ(sc, MII_BMCR);
  252         if (bmcr & BMCR_ISO) {
  253                 mii->mii_media_active |= IFM_NONE;
  254                 mii->mii_media_status = 0;
  255                 return;
  256         }
  257 
  258         if (bmcr & BMCR_LOOP)
  259                 mii->mii_media_active |= IFM_LOOP;
  260 
  261         if (bmcr & BMCR_AUTOEN) {
  262                 /*
  263                  * The media status bits are only valid of autonegotiation
  264                  * has completed (or it's disabled).
  265                  */
  266                 if ((bmsr & BMSR_ACOMP) == 0) {
  267                         /* Erg, still trying, I guess... */
  268                         mii->mii_media_active |= IFM_NONE;
  269                         return;
  270                 }
  271 
  272                 /*
  273                  * The media is always 1000baseSX.  Check the ANLPAR to
  274                  * see if we're doing full-duplex.
  275                  */
  276                 mii->mii_media_active |= IFM_1000_SX;
  277 
  278                 anlpar = PHY_READ(sc, MII_ANLPAR);
  279                 if ((sc->mii_extcapabilities & EXTSR_1000XFDX) != 0 &&
  280                     (anlpar & ANLPAR_X_FD) != 0)
  281                         mii->mii_media_active |= IFM_FDX;
  282         } else
  283                 mii->mii_media_active = ife->ifm_media;
  284 }
Cache object: 6eb7f68666469ab51182a708f36f2660
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FreeBSD/Linux Kernel Cross Reference sys/dev/mii/gentbi.c

FreeBSD/Linux Kernel Cross Reference
sys/dev/mii/gentbi.c
